Question

Determine the enthalpy of formation of MgO from the following. (***reminder: you may have to rearrange the equations!!!) Round answer to the nearest whole number. Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ΔH = -229 MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(l) ΔH = -74 H2(g) + 1/2O2(g) → H2O(g) ΔH = -286 Mg(s) + 1/2O2(g) → MgO(s) ΔH = ???

Name: determine the enthalpy of formation of mgo from the following reminder you may have to rearrange the equations round answer to nearest whole number mgs 2haq mg2aq h2g h 229 mgos 2haq mg2aq h 57544
Uploaded: 2022-09-02T15:15:48-08:00
Duration: 3 min 52 s
Channel: Adi S
Description: determine the enthalpy of formation of mgo from the following reminder you may have to rearrange the equations round answer to nearest whole number mgs 2haq mg2aq h2g h 229 mgos 2haq mg2aq h 57544

          Determine the enthalpy of formation of MgO from the following. (***reminder: you may have to rearrange the equations!!!) 
Round answer to the nearest whole number.
Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g)  ΔH = -229
MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(l)  ΔH = -74
H2(g) + 1/2O2(g) → H2O(g)  ΔH = -286
Mg(s) + 1/2O2(g) → MgO(s)  ΔH = ???

Added by Brandon V.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Adi S

09/02/2022

Step 1

Equation 1: Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ΔH = -229 Equation 2 (reversed): MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(l) ΔH = +74 Equation 3: H2(g) + 1/2O2(g) → H2O(g) ΔH = -286 Show more…

Show all steps

Thanks for your feedback!

Determine the enthalpy of formation of MgO from the following. (***reminder: you may have to rearrange the equations!!!) Round answer to the nearest whole number. Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g) ΔH = -229 MgO(s) + 2H+(aq) → Mg2+(aq) + H2O(l) ΔH = -74 H2(g) + 1/2O2(g) → H2O(g) ΔH = -286 Mg(s) + 1/2O2(g) → MgO(s) ΔH = ???